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Since the beginning of 1952, the Leningrad subscriber loudspeaker has been produced by the Leningrad artel "Radist". Subscriber loudspeaker '' Leningradets '', type 0.25-GD-III-1 is designed to listen to the radio program transmitted over a wired radio network with a voltage of 30 volts. The loudspeaker has a power consumption of 0.25 watts. Range of working frequencies 200 ... 5000 Hz. The dimensions of the AG are 20x16x9.5 cm. Weight 2 kg.